var buttons = ['home','about','contact','conventions','espanol','payment','membership','myida'];
var button_file_type = 'gif';

for (i = 0; i < buttons.length; i++) {
	eval("var " + buttons[i] + " = new Image();");
	eval(buttons[i] + ".src = 'images/button_" + buttons[i] + "." + button_file_type + "';");
	eval("var " + buttons[i] + "_on = new Image();");
	eval(buttons[i] + "_on.src = 'images/button_" + buttons[i] + "_on." + button_file_type + "';");
}

function switchon(x,y) {
	document.images[x].src = y.src
}

function switchoff(x,y) {
	document.images[x].src = y.src
}